package linux-backports-modules-wireless-2.6.32-21-preempt (not installed) failed to install/upgrade: trying to overwrite '/lib/udev/compat_firmware.sh', which is also in package linux-backports-modules-wireless-2.6.32-21-generic 0:2.6.32-21.11

Bug Description

package linux-backports-modules-wireless-2.6.32-21-preempt (not installed) failed to install/upgrade: trying to overwrite '/lib/udev/compat_firmware.sh', which is also in package linux-backports-modules-wireless-2.6.32-21-generic 0:2.6.32-21.11